Hemodialysis is a treatment for patients with kidney failure. One of the main problems in patients on hemodialysis is increasing of interdialytic weight gain (IDWG) due to decreased kidney excretion function. Increasing of interdialytic weight gain cause dangerous conditions and reduce the function of whole-body systems, especially cardiovascular and respiratory systems. These conditions require appropriate intervention. Various references reported intradialysis exercise can be an alternative intervention to reduce interdialytic weight gain. The purpose of this study was to determine the effectiveness of intradialytic exercise intervention to reduce interdialytic weight gain in patients on hemodialysis. A quantitative descriptive analytic study was conducted. Sixty-four patients on hemodialysis were randomly selected in hemodialysis unit. Patients performed intradialytic exercise twice a week for 8 weeks. Statistical analysis with general linear model repeated measure showed there was decrease in the interdialytic weight gain mean in patients on hemodialysis after 3-8 weeks intervention intradialytic exercise with p value of 0.000; <0.05. The interdialytic weight gain mean decrease between 0.281 and 1.438kg. Performed minimal four weeks intradialytic exercise was effective to reduced interdialytic weight gain in patients on hemodialysis. Based on the results of the study, it is suggested for nurses to educate patient on hemodialysis about intradialytic exercise. Intradialytic exercise can be an alternative independent nursing intervention to reduce interdialytic weight gain in patients on hemodialysis.